Drazice TO-20 운영 및 설치 매뉴얼 - 페이지 8

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Drazice TO-20에 대해서도 마찬가지입니다: 작동 및 설치 매뉴얼 (8 페이지)

페이지 인쇄

If the hot water heater is mounted in a tight, small space, or in an intermediate ceiling, etc.,

you have to make sure that the connecting side of the appliance (connections to water

supply, area for electric plugging) remained accessible and no heat accumulation occurs.

Free space of up to 600 mm from the bottom edge of the heater has to be available under

the heater. When mounted directly under the ceiling, the distance from the ceiling has to

be 50 mm at least.

2.3 PLUMBING FIXTURE

Connection to plumbing fixtures is illustrated on Figure 3. For potential disconnection of the

heater, the service water inlets and outlets must be provided with screw coupling G1/2". The

safety valve can be mounted both in vertical and horizontal position in the indicated direction

of cold water flow. Safety valve is mounted on the cold water inlet identified with a blue ring.

The heaters must be equipped with a drain valve.

Each hot service water pressure heater must have a safety valve with a membrane spring. The

safety valve must be easily accessible, as close to the heater as possible. The input pipes must

have at least the same clearance as the safety valve. The safety valve is placed high enough to

secure dripping water drain by gravity. We recommend mounting the safety valve onto

a branch pipe. This allows easier exchange without having to drain the water from the heater.

Safety valves with fixed pressure settings from the manufacturer are used for the assembly.

Starting pressure of a safety valve must be identical to the maximum allowed heater pressure,

and at least 20% higher than the maximum pressure in the water main. If the water main

pressure exceeds such value, a reduction valve must be added to the system. No stop valves

can be put between the heater and the safety valve. During the assembly, follow the guide

provided by the safety equipment manufacturer. It is necessary to check the safety valve each

time before putting it into operation. It is checked by manual moving of the membrane from

the seat, turning the make-and-break device button always to the right. After being turned,

the button must click back into a notch. Proper function of the make-and-break device results

in water draining through the safety valve outlet pipe. The cold water inlet of each individually

closable heater must be fitted with a seal, test tap or plug to check the non-return valve, as

well as a non-return valve and safety valve. Heaters with a volume of more than 200 litres

must also be fitted with a pressure gauge.

Water may be dripping off the drain pipe of the safety valve; the pipe must be open into the

air, pointed down; environment temperatures must not drop below zero.

When draining the heater, use a recommended drain valve. First, close water input into the

heater. Find necessary pressure values in the following Table 3. For proper safety valve

operation, a backflow valve must be mounted on the inlet pipes, preventing spontaneous

heater draining and hot water penetrating back into the water main. When assembling the

security equipment, follow Standards. We recommend that the hot water distribution from

the heater was as short as possible to minimise heat losses.

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